Pump Control Connections - Takagi 110 Indoor (T-KJr2-IN) Installation Manual And Owner's Manual

The 510 (T-D2) model water heater can be used to control a recirculation pump. Proper pump control
helps to preserve the life of the system and saves energy as well.
The water heater pump control port is a "normally-open dry contact", and therefore needs additional
components to properly control a recirculation pump, such as a relay. To control a recirculation pump,
connect the pump to a relay and the relay to the "Pump connector" in the water heater as shown in the
diagram below. (In an Easy-Link System, connect the pump ONLY to the "PARENT" unit.) The pump is to
be connected using suitable relays shown in the diagram below.
Please make sure the relays are properly rated for the recirculation pump.
Using the water heater's internal thermistors as a temperature control, the recirculation pump will only
turn on when recirculation is needed.
In an Easy-Link System, the pump must be connected to the "Pump
connector" in the only "PARENT" unit using an suitable relay. If the
pump is connected to any of the "CHILD" units, the pump will not
work.
CAUTION
These components are NOT included with the water heater and are
external to the unit. They must be acquired separately.

PUMP CONTROL CONNECTIONS

Available on the 510 (T-D2) model only
120 VAC
Thermal relay
220 VAC etc for
for additional
safety relay
23
Connect to this "Pump connector"
Power supply
for relay
Power supply
for pump
120 VAC
220 VAC etc
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